Drawing-board.



No. 796,732. PATENTED AUG, 8, 1905. w. L. E. KEUFPEL.

DRAWING BOARD.

APPLICATION FILED ms. 12. 1904. RENEWED JUNE 30,1905.

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WILLIE L. E. KEUFF EL, OF HOBOKEN, NEW JERSEY, ASSIGNOR TO THE KEUFFEL &ESSER COMPANY, A CORPORATION OF NEW JERSEY.

DRAWING-BOARD.

Specification of Letters Patent.

Patented Aug. 8, 1905.

Application filed February 12, 1904. Renewed June 30, 1905. Serial No.267,850.

To (LZZ whom it may concern.-

Be it known that I, WILLIE L. E. KEUFFEL,

a citizen of the United States, and a resident of of soft wood in orderto receive the thumb-- tacks with which the paper secured on them isfastened down. They are generally used also where there is plenty ofsunlight, and the heat of the suns rays affect them as described.Dovetailed battens have been employed to stiffen such boards, andbattens have also been directly screwed or nailed to their under surfacefor the same purpose. It is a matter of experience, however, thatbattens so secured do not actually prevent warping and when it doesoccur are not provided with means to remedy such condition and sometimesby their own warping distort the board.

The object of my invention is to provide a drawing-board with battenswhich will be at least as eflicient as those now commonly employed andwhich can in addition be readjusted to remedy a distortion of the boarddue to warping, if it does occur.

In brief, the invention consists in providing a drawing-board withbattens and means for securing them in place, which may be arranged in anew manner and readjusted to straighten the board if distorted.

In the drawings, Figure 1 is a bottom plan view of a portion of adrawing-board provided with my improved invention. Fig. 2

' is a sectional view, with parts in elevation, of

aportion of my improved drawing-board; and Fig. 3 is a section on theplane of the line 3 3 in Fig. 1.

In the drawings, 10 is a drawing-board of usual form and material, thegrain of the wood running from left to right when it is in the positionshown in the views presented.

20 is a batten, of which there may be several, placed as the size of theboard may require. These battens are preferably made of hardwood withthe grain running trans- Versely to the grain of the wood in the board.

They may be made of metal, however, without departing from the principleof the invention. Each batten has a broad bearing surface adapted torest-against and bear upon the under surface of the board 10 and isprovided along its length on each side with a flange 21 21.

3O 30 are bearing-plates, each comprisinga body provided at one end withan upwardly and inwardly extending angular flange 31 and at the otherend with a downwardlyextending angular flange 32, which engages theboard, and said body also has an aperture adapted to receive a screw 40,which is turned into the Wood and the head of which rests on top of theflange. These plates are preferably made of metal. The flange 32 has thefunction of imparting to them an element of elasticity by lifting themain body of the plate a short distance from the surface of the wood,and thus enables the flange 31 to be brought properly into engagementwith the flange of the batten when the wood has shrunk or when the partsare not nicely fitted one to another.

When the parts are assembled, the battens 20 are arranged in suitableposition and the plates 30 30 are arranged at any distances apart whichmay be desirable, the flanges 31 31 extending within and engaging withthe flange 21. The screws 40 40 are placed in position and turned intothe board 10. When thus assembled, the battens will ordinarily keep theboard from warping for some time. If, however, warping does occur, thescrews 4.0 40 are loosened, the plates 30 30 are slid along the flanges21 21 until in proper position near the place where the distortion hasoccurred, and the screws are again tightened. This brings the distortedor warped portion of the board home against the batten, straightens itout, and makes the board flat and again serviceable. Such readjustmentmay be made as often as necessary-that is, this construction permits thecontraction and expansion of the board and at the same time will keep ittight against the batten.

What I claim as new is- 1. A drawing-board provided with a batten havinga longitudinal flange and means for securing said batten to said board,comprising a plate having at one end a flange which engages the flangeof the batten and at its other end a supporting-flange which extends atan angle with the body portion of the plate and engages the surface ofthe board and supports said body portion in position elevated above saidboard and normally approximately parallel with said board, said bodybeing adapted to be drawn into position inclined toward the surface ofsaid board from its said supporting-flange, and means for securing theplate removably to said board, substantially as described and for thepurposes specified.

2. A drawing-board provided with a batten having a longitudinal flange,a plurality of l'lolding-plates each comprising a body, having at oneend an angular flange the free end of which engages the flange of thebatten and at its other end a flange which engages the board and isadapted to support said body out of contact with the surface of theboard, and means extending through said body for securing the plate tothe board.

3. A drawing-board provided with a batten having its. grain runningtransversely to the grain of the wood in the board, said batten havinglongitudinal flanges, and means for securing said batten removably tothe board, comprising a plurality of holding-plates each having a mainbody, provided at one end with a flange which engages the flange of saidbatten and at its other end with a flange which engages the board andsupports the body yieldably upon the board, and means extending throughsaid body for securing the plate removably to the board.

l/Vitness my hand this 11th day of February, 1904:, at the city of NewYork, in the county and State of New York.

HERMAN MEYER, ESTELLE M. TrrUs.

